Telephone-receiver.



Patented Aug. 22,1899.

.1. A. wlrLLlAMs. TELEPHONE RECEIVER.

(Appliation lqd Dee. 28, 1898.)

(No Model.)

W//VESSES: UM@

UNITED STATES PATENT OFFICE.

JOSEPH A. VILLIAMS, OF CLEVELAND, OHIO, ASSIGNOR TO THE NVILLIAMIS ELECTRIC COMPANY, OF SAME PLACE.

TELEPHONE-RECEIVER. y

S'PCIFIATION forming part of Letters Patent No. 631,355, dated August 22, 189e.

Y Application filed December Z8, 1.898. Serial No. 700,490. (No model.)

T0 @ZZ whom t may concern.-

Be it known that I, JOSEPH A. WrLLrAus, of Cleveland, Cuyahoga county, Ohio, have invented certain new` and useful Improvements in Telephone-Receivers; and I do hereby declare the following to bea full, clear, and exact description of theinvention,such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in telephone-receivers 5 and it consists in certain features of construction and combinations of parts hereinafter described, and pointed out in the claims. p

In the accompanying drawings, Figure I is a side view, mostly in longitudinal section, of an instrument embodying my invention. Fig. II is a transverse section on line II II, Fig. I, looking inwardly. Fig. III is a transverse section on line'III III, Fig. I, looking inwardly. Fig. IV shows one of the devices employed in concealing and protecting one of the bobbins terminal wire ends and'coupling the said end with a wire electrically connected with one of the instruments bindingposts. Fig. Vis a sectional view illustrating the connection of screws J with the bobbinbearing disk K. Fig. VI is a-sectional view of portions of .disks K and m and illustrates the registering wire-receiving perforations K2 and m2 of the said disks. VII is a sectional view of portions of disks K and m and illustrates the function of registering perforations K3 and m3 of the said disks. Y

Referring to the drawings, A designates the hollow case of the instrument, which'case is preferably made of polished ebonite orvulcanite in the usual manner.

B represents a U-shaped permanent mag-VV net that is suitably arranged within and cen'- trally and longitudinally of the case A andv wire Gr2 in the usual manner. The cores of- 'and thecores of the bobbin.

the bobbin are composed, respectively, of suitable Y magnetic material-such, for instance, as soft iron-and extend inwardly a suitable distance beyond the inner end of the lbobbin between the opposing inner surfaces of the free ends ofthe permanent magnet,that is cut away -upon the opposing sides of the said ends, as at B', to accommodate the location of the two cores that engage the different magnet ends, respectively. Insulating material i is interposed between the inner endsof the cores and secured in place by a brass pin t.

'The instruments earpiece D is provided with a centrally-located aperture d inthe ordinary manner.

The instruments diaphragm I is interposed between the earpiece D and the adjacent end. of the case A.

The bobbin is adjustable toward and from the diaphragm to accommodate the formation of the space required between the diaphragm Each core of the bobbin is provided with two brass or non- 'magnetic heads g g, that are fixed upon the .core lat opposite ends, respectively,'of the 'cores and preferably contiguous to the outer surfaces of the inner heads g of the cores.

`The disk K is engaged at its surrounding ,edge by three screws J J. J, that support the ldisk and the latters load (the bobbin) and engage correspondinglythreaded holes d,

.formed in and longitudinally of case A, as

shown in Fig. V, and by dotted lines, Fig. I. The said screws J J J are arranged equidistant apart around the edge of disk K, and each screw has two annular shoulders J J closely overlapping opposite sides, respectively, of the disk, and the screws between the said shoulders snugly engage the disk, that in its surrounding edge has slots K', having arc-shaped walls that partially and snugly embrace the screws. Fig. V illustrates the connection of a screw J with the disk K. By this construction it will be observed thatthe IOO bobbinis supported within the earpiece-bearing end of the instruments case at three different points arranged equidistant apart, so that the bobbin is rigidly and accurately supported within the said portion of the case and its adjustment relative to the diaphragm is not affected by contraction and expansion of the case, as would be the consequence of a rigid connection between the bobbin and the adjacent end of the permanent magnet.

A disk m of insulating material is fixed upon the cores G at the inner side of the bobbin-bearing disk.

P P designates the binding-posts with which the head C of the instruments case is provided. The two wires 11,' and 1U that lead to the instrument engage the different posts, respectively,and each post consists, preferably, of two jaws p and p'. The jaw p of each post is fastened to the head U in any approved manner, whereas jaw p of the post is formed by the head of a screw p2, that engages a nut n, fixed within the head C. The nuts n are molded into the head Cin the process of molding the instruments case and are provided, respectively, with external lugs or ribs 1t', that are embedded within the vulcanite or material of the head C, so that the nuts are positively fixed within the head and are not liable to displacement from rough usage of the instrnment.

Two ends of the wire of each coil extend inwardly through the disk K and through the insulation m and are soldered together at G2 at the inner side of the said disk, that has two perforations K2 K2 arranged a suitable distance apart for accommodating the extension therethrough of the said wire ends, and the insulating-disk m has perforations m2 registering with the said perforations in the disk K. Perforations m2 are just large enough to easily receive the wire; but the perforations K2 are considerably larger, as shown very clearly in Fig. VI, so that the insulation of the wire will not be abraded or worn by the surrounding walls of perforations K2, and the necessity of using insulating-bushings within perforations K2 is avoided. Each of the other ends of the wire of the coils, or, more properly, the terminal wire ends G4 of the bobbin, extend inwardly through registering perforations Ksand lm3, formed in the bobbin-bearing disk K and insulating-disk fm, respectively, and into the channel or groove R2, formed in the outwardly-extending arm R of a couplingforming metallic piece R, that is interposed between the said terminal end of the bobbin and one of the wires 102, leadinginwardly from a binding-post. A perforation K3 and the perforation m2, registering with the said perforation K3, are shown very clearly in Fig.VII. The perforation m3 is just large enough to easily receive the enga-ging wire; but the perforation K3, registering with the said perforation m3, is considerably larger, so that its surrounding wall will not injure the wire and not necessitate the employment of an insulatingbushing in the perforation. Two wires 102 11:2 are electrically connected with the different bindingposts, respectively, and extend inwardly from the posts at opposite sides, respectively, of the permanent magnet. The wire-coupling devices R are secured in any approved manner to the internal shoulder a of case A. One of the wires 102 electrically connects with an inwardly-extending arm R4 of one of the wire-coupling devices, and the other wire electrically connects with the inwardly-extending arm R4 of the other wirecoupling device. The wire-coupling devices are arranged at opposite sides, respectively, of the bobbin. The arms R of the Wire-coupling devices are in close proximity to and have their wirereceiving grooved or channeled 4sides facing the surrounding wall of the bobbin-receiving chamber of the case A.

It is obvious that my improved manner of arranging or disposing of the terminal Wire ends of the bobbin is meritorious, because it removes the said ends into a safe place, where they will not be harmed by careless handling of the instrument or by the use of a screwdriver employed in adjusting the bobbin-supporting screws. I would remark, also, that heretofore receivers having a vulcanite case or shell had the earpiece screwed onto externalthreads formed directly upon the shell. The threading of vulcanite or similar material is not very practical, and the frequent screwing on and off of the earpiece soon wears away or mutilates the threads. I have therefore molded into the outer side of the bobbinreceiving end of the case A a metal shell or ring O, that has short inwardly-extending projections O embedded in the shell A, so as to positively fix the said annular band of metal to the case A. The ring O is externally screwthreaded to accommodate the attachment of the corresponding internally-threaded earpiece and at its outer end has an internal externally-smooth annular flange O2, that forms a seat for the diaphragm, that is held to the said seat by the internal annular shoulder D' of the earpiece.

It is obvious that my improved construction eectually avoids the objection of forming the threads directly upon the vulcanite case or shell.

1. In a telephone-receiver, the combination with the case or shell enlarged at one end to form the bobbin-receiving chamber and having an internal annular shoulder at the inner end of the said chamber: of the double bobbin within the said chamber; a disk having the bobbin fixed to its outer side, and three screws arranged equidistant apart along the surrounding edge of the disk and having, re-

spectively, two annular shoulders closely overlapping opposite sides, respectively, of the disk, which screws are screwed into the aforesaid shoulder.

2. A telephone-receiver having a vulcanized shell or case provided with binding-posts IOO IIO

formed, respectively, of two wire-clamping liaws, whereof one is the head of a screw and a nut engaging the said screw and molded into the case or shell.

3. In a telephone-receiver, the combination with the vulcanized shell or case provided with binding-posts formed, respectively, of two wire-clamping jaws, whereof one is the head of a screw: of nuts engaging the jawforming screws and molded into the case or shell and ribbed externally, substantially as and for the purpose set forth.

4:. In a telephone-receiver, the combination with the case or shell having an enlarged end forming the bobbin-receiving chamber, and having two binding-posts atits opposite end, and two wires leadingin wardly from the diderent binding-posts,respectively,and the bobbin within the said chamber; of two wire-coupling devices arranged at opposite sides, respectively, of the bobbin and electrically connected with the different aforesaid wires, respectively, and also electrically connected with opposite terminals, respectively, of the bobbin.

5. In a telephone-receiver, the combination with the case or shell enlarged at one end to form the bobbin-receiving chamber, and having two binding-posts at its opposite end; two wires leading in wardly from the different binding-posts, respectively;V a disk supported within the inner end of the aforesaid chamber, and the bobbin fixed to the disk at the latters outer side, said bobbin having the terminal-forming ends of its wire extending inwardly through the disk: of two wire-cou pling devices supported at opposite sides, respectively, of the bobbin and electrically connected with the different terminals, respectively, of the bobbin, and electrically connected, also, with the different binding-posts, respectively.

(5. In a telephone-receiver, the combination with the case or shell enlarged at one end to form the bobbin-receiving chamber, and having an internal annular shoulder at the inner end of the said chamber, a disk within the inner end of the said chamber, the bobbin supported from the disk at the latters outer side, and having its terminal wire ends extending through the disk, and the two binding-post connecting-wires extending into the aforesaid shell or case a suitable distance; of two wire coupling devicessupported from the aforesaid shoulder 'at opposite sides, respectively, of the bobbin, and electrically connected to the different terminals,respectively,' of the bobbin, which coupling devices are electrically connected, also, with the different binding-posts, repectively.

7. In a telephone-receiver, the combination of the case or shell enlarged at one end to form the bobbin-receiving chamber, a metallic disk supported within and transversely of the inner end of the said chamber; an insulating-disk at the inner side of the first-mentioned disk; a bobbin fixed to the said disk at the latters outer side and having its terminal-forming wire ends extending through comparatively large holes formed in the metallic disk and through comparatively small holes formed in the insulating-disk; the two binding-posts; two wires electrically connected with the differentposts, respectively, and extendinginto suitable proximity to the inner side of the insulating-disl ,'and Wirecoupling devices supported from the shell or case, which coupling devices are electrically connected, respectively, to the different terminals of the bobbin and electrically connected, also, with the different binding-posts, respectively. t

8. In a telephone-receiver, the combination with the case or shell enlarged at one end to form the bobbin-receiving chamber; a disk within the said chamber and bobbin supported from the said disk and having the terminal-forming ends of its Wires extending inwardly through the disk; the binding-posts, and the wires extendinginto the instrument from the different posts, respectively; of two wire-coupling devices supported at opposite sides,respectively, of the bobbin and having arms electrically connected to-the different terminals, respectively, of the bobbin, and other armselectrically connected with the different binding-posts, respectively.

9. In a telephone-receiver, the combination with each terminal wire end of the bobbin, and the binding-post-connecting wire electrically connected with the said terminal; of a wire-couplin g device interposed between the said wires and having an inwardly-extending arm electrically connected with the bindingpost-connecting wire, and. having an outwardly-extending arrn provided with a groove or channel engaged by the aforesaid bobbinterminal.

IO. Atelephone-receiverhavingavulcanite case or shell provided with an externallyscrew-threaded band or ring molded into the outer side of the earpiece-receiving end of the case or shell, substantially as shown, for the purpose specified.

l1. A telephone-receiver having a vulcanite case orv shell provided with an externallyscrew-threaded metal band or ring O molded into the outer side of the earpiece-receiving end of the case or shell, and having the projections O embeddedin the case or shell, substantially as and for the purpose set forth.

Signed by me at Cleveland, Ohio, this 17th day of December, 1.898.

JOSEPH A. VIL'LIAMS.

Witnesses:

C. H. DORER, A. H. PARROTT.

IOO

IIO

IIS 

